Stop-motion for warring-machines



(No Model.) 2 Sheets-Sheet 1.

O. DENN.

STOP MOTION FOR WARPING MACHINES. No. 338,042. Patented Mar. 16, 1886.

m m W N. PETERS, Photo-Lilhogmpher. wahin mn. D. (L

WITNESSES (No Model.) 2 Sheets-Sheet 2.

C. DENN.

STOP MOTION FOR WARPING MACHINES.

No. 338,042. I Patented Mar. 16, 1886.

orneys N. PEYERS. Phalb-Ukbograpbcr. Washington. no,

NITED STATES PATENT OFFICE.

CLAYTON DENN, OFPHILADELPHIA, PENNSYLVANIA.

STOP-MOTION FOR WARPING-MACHINES.

SPLEGIPICATION forming part of Letters Patent No. 338,042, dated March. 16, 1886.

Application filed January 12 1884. Serial No. 117,270.

To all whom, it may concern:

Be it known that I, CLAYTON DENN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, haveinvented a new and useful Stop-Motion for XVarping-Machines, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to stop-motion devices for warping-machines, and it is, designed as an improvement on the machine for which Letters Patent of the United States were granted to R. Garsed and myself September 20, 1859, No. 25,501. Heretofore in this class of machines as the threads pass through the drop-wires the tension of the threads on the dropwires raises the latter, so that their rightangled lower bent ends bear against the lower side of the perforated plate, and the threads, byabrasion with the loops of the drop-wires, soon cut through them, and thus rendering it necessary to replace the drop-wires with new ones, which is a very slow, tedious, and expensive operation. Moreover, the threads bend or carry the upper ends of the dropwires forward to such an extent as to sometimes prevent the drop-wires from dropping when the threads break. To remedy these defects I employ two bars or rods suitably supported at their ends and extending lengthwise of the containing box and arranged transversely one behind and one in front of each transverse row of drop-wires or 1oops,.and in nearly the same plane as the drop-wires.

My invention further consists in arranging the drop-wires or loops diagonally across the containing box for keeping each warp-thread in its proper place, and precluding the possibility of error in piecing the ends of the warpthreads.

In the accompanying drawings, Figure 1 is a front view of a structure embodying myirnprovements. Fig. 2 is a central section of the device shown in Fig. 1, and Fig. 3 is a top plan view showing the diagonal arrangement of the drop-wires.

A represents a plate suitably supported and perforated for the passage of a series of vertical wires or rods, each of which is formed of a single piece of wire bent substantiallyin the shape of an inverted letter U, thereby form- No model.)

ing a loop at its upper end. Each transverse row of drop-wires is arranged in a higher plane than that of the preceding row, so that each longitudinal row of wiresinclines gradually upward from the front to rear, as is coinmon in this class of machines.

The drop-wires B are diagonally arranged across the box for the purpose of keeping each thread in its proper place, and also to prevent mistakes in piecing the ends-that is to say, each drop-wire is slightly out of line with wires being only about one-fiftieth part of an inch to one side of the row behind it. Heretofore the warp-threads have been kept separate in this class of machines by the use of reeds, consisting of two parallel bars set a few inches apart, and connected by a number of parallel strips called dents, between which the warp-threads are passed. \Vhere reeds are used, the abrasion and tension of the warp-threads on the dents result in frequently breaking the threads, and the broken threads have to be pieced or reunited before the operation of warping can proceed. Moreover,

the use of reeds is attended by considerable expense, as they become worn and useless after a while and have to be replaced.

My diagonal arrangement of the drop-wires enables me to dispense altogether with the use of the reed, and thereby remove one of the causes of danger to the threads, reducing very materially the breakage thereof, and saving the time and labor of piecing the ends, and thereby increasing the efficiency of the machine, as the latter must be stopped every time a thread breaks.

Two bars or rods, 0, suitably supported at their ends, and extending lengthwise of the containing-box, are arranged transversely one behind and one in front of each transverse row of drop-wires or loops B, as shown, and in nearly the same plane as the drop-wires. The warp-threads may pass over the front rod and under the rear rod, as illustrated in the three highest transverse rows in Fig. 2, or may pass beneath both wires 0, as shown in the remaining transverse rows in said figure. By employing the rods 0 the tension of the threads is borne by the said rods, and the drop-wires, which are thereby merely suspended from the threads and bear upon them only to the extent of their weight, are relieved entirely from strain. The drop-wires are also maintained in a vertical position, so that when a thread breaks no impedimentis offered to the fall of the drop-wire. WVhen the rods Obecome worn by the threads, they may be readily replaced, and at a comparatively small cost.

A plate attached to a rock-shaft, D, suitably journaled, is supported and counterbalanced by weights hung on the said shaft D, the equilibrium of said plate being such as to be overcome when one of the drop-wires or loops B drops upon it.

From the foregoing it will be apparent that by arranging the longitudinal rows of dropwires diagonally the liability of mistakes in manipulating the ends of thethreads is ob- Viated and the possibility of the same becoming entangled is removed. When one of the threads becomes broken, its particular drop- .wire drops upon the plate, overcomes the counterbalancing action of the weights, partially rotates theshaft D, and elevates the arms, which throws the machine out of gear, and it ceases to operate until the broken thread has its end pieced or reunited.

I am aware that it has been heretofore proposed to provide the stop-motion for. a loom with heddles that are arranged on the same horizontal plane and diagonally or out of line witheach other. This was done, however, in

orderto allow room for the eyes on the heddles to work and keep the eyes from touch ing each other. This arrangement of.' the heddles could not be adapted to the drop-wires ofawarping-machine, and is only applicable xtoa loom.

In my warping-machine it is necessary that essential when it is taken in consideration that in my warping-machine the threads which hold up the shorter row of wires pass between and below the tops of the longer rows, and are about one-quarter of an inch apart in a vertical plane andone-fiftieth of an inch apartin ahorizontal plane.

In my warping-machine the threads must be close together, and, since this is the case,

it follows that they should be kept apart both' vertically asw'ell as horizontally. By my ar' rangement the threads are kept at different heights and out'of the same horizontal plane. and also retained alongside of each other and prevented from becoming crossed and entangled as they pass through the machine.

Having thus fully described my invention, I clain1 1. A stop motion having drop-wires arranged in'rowsdiagonally-that is to say, the

drop-wires of one row being out of line with the drop-wires of the rows before and behind it, and each succeeding row being located on a higher plane than the preceding row, so as to prevent the threads from coming in contact either vertically or horizontally, as set forth.

2. A stop motion having drop-wires arranged in rows diagonallythat is to say, the drop-wires of one row being out of line with .the drop-wires of the rows before and behind it, and each succeeding row being located on a higher plane than the preceding row, soas to prevent the threads from comingin contact with each other either vertically .or horizontal1y,and 'thetransverse bars arranged in pairs at the front and rear of each row of drop-wires, as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

CLAYTON .DENN,

, \Vitnesses:

EDWARD ONEILL, CHARLES DENN. 

